* [JAVA-1657] core-java-modules JUnit and Maven Surefire Plugin upgrade
* [JAVA-1657] Changed sub modules parents to core-java-modules and core-java-modules to parent-java
* [JAVA-1657] Upgraded JUnit Jupiter version
* [JAVA-1657] Get JUnit 4 dependency transitively
* PowerSet generation is Java and respective unit tests are added
* function name is adjusted to the actual ordering name (Reverse Lexicographical ordering)
* Guava example test function is changed
* LazyLoad powerSet (based on Guava implementation) is added
* set is used instead of map.keySet()
* Lexicographic Order and Gray Order are removed from function names. Unused function (rank and unrank), which are not used in the text, are removed
* PowerSet generation is Java and respective unit tests are added
* function name is adjusted to the actual ordering name (Reverse Lexicographical ordering)
* Guava example test function is changed
* LazyLoad powerSet (based on Guava implementation) is added
* set is used instead of map.keySet()